De grootte van Eris is echter met behulp van de Hubble-telescoop direct gemeten, en hieruit is gebleken dat deze in doorsnede inderdaad ongeveer 2400 km bedraagt.[1] — The size of Eris has been measured, however, directly with the help of the Hubble telescope, and from this it has become apparent that it indeed amounts to approximately 2400 km in diameter.